German Hessen Elevation Models: Difference between revisions
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* '''Version:''' Data were downloaded in February 2022. Data originates from years 2009-2020, dependent on area (see map to the right). | * '''Version:''' Data were downloaded in February 2022. Data originates from years 2009-2020, dependent on area (see map to the right). | ||
* '''Accuracy:''' | * '''Accuracy:''' | ||
** Vertical: For the 1m resolution dataset the vertical accuracy is stated to be ±0.3m. | ** ''Vertical:'' For the 1m resolution dataset the vertical accuracy is stated to be ±0.3m. For the 5m and 25m data, it is ±1.1m and ±5.1m. The uncertainty is given as a two-sigma value (95% confidence). | ||
** Horizontal: N/A | ** ''Horizontal:'' N/A | ||
== Usage Notes == | == Usage Notes == | ||
Revision as of 08:05, 17 February 2022
NOTE 2022-02-17: This dataset is currently being integrated in windPRO.
Introduction
The elevation model of the German Bundesland of Hessen is a digital terrain model produced from data originally obtained from the open geodata of Hessen. The source data is produced and delivered by the Hessische Verwaltung für Bodenmanagement und Geoinformation (HVBG). Two elevation models are delivered with windPRO: one at 5m resolution and one at 20m resolution. The original models are available at a maximum resolution of 1m, however, the highest resolution model in windPRO version is resampled by EMD to obtain a slightly coarser resolution - 5m. This is done in order for the data to be operational for the larger domains needed in the context of wind farm analysis’ and wind flow modelling. Data made available by EMD represents the data status of February 2022.
Dataset Overview
- Spatial Coverage: Bundesland of Hessen
- Resolution: 5m and 20m (in windPRO)
- Data-type: Digital Terrain Model (DTM)
- Coordinate system
- Horizontal: ETRS89/UTM32 (EPSG 25832)
- Vertical: N/A
- Version: Data were downloaded in February 2022. Data originates from years 2009-2020, dependent on area (see map to the right).
- Accuracy:
- Vertical: For the 1m resolution dataset the vertical accuracy is stated to be ±0.3m. For the 5m and 25m data, it is ±1.1m and ±5.1m. The uncertainty is given as a two-sigma value (95% confidence).
- Horizontal: N/A
Usage Notes
- Download and processing time is in the order of (a few) minutes for the high-resolution dataset (5m grid) - so please be patient! Due to the large amounts of high-resolution elevation data and the tile-based storage system, you will experience that downloading the data for a site may last a few minutes. If this is a problem for you, please consider downloading 'smaller' areas or downloading the coarser 20m resolution data.
- Please note that for the 5-meter grid - the downloaded area is limited to 20 km x 20 km to keep the files at a usable size. The data within the elevation object may be extended with coarser data for a bigger area if needed.
Availability from within WindPRO
The data are available directly from within windPRO in 5-meter and 20-meter grid resolution. The data can be accessed from the online-services in the following objects:
- Line Object (with purpose to height contour lines)
- Elevation Grid Object
License and Attribution
The data is based on open geo-data of Hessen, released under a open-data policy on February 1st 2022.
When using the dataset, the please acknowledge the origin of the data, such as:
EMD/windPRO elevation model based on data from Hessische Verwaltung für Bodenmanagement und Geoinformation (HVBG).
The usage conditions are available from this pdf from HVBG - here.
Acknowledgement
- The HVBG are thanked for producing this digital elevation dataset – and disseminating it in the public domain and thus for aiding the development of renewable energy and wind energy in particular.